申请人:Carter W. Phillip
公开号:US20060030158A1
公开(公告)日:2006-02-09
A composition suitable for tantalum chemical-mechanical polishing (CMP) comprises an abrasive, an organic oxidizer, and a liquid carrier therefor. The organic oxidizer has a standard redox potential (E
0
) of not more than about 0.5 V relative to a standard hydrogen electrode. The oxidized form comprises at least one pi-conjugated ring, which includes at least one heteroatom directly attached to the ring. The heteroatom can be a N, O, S or a combination thereof. In a method embodiment, a CMP composition comprising an abrasive, and organic oxidizer having an E
0
of not more than about 0.7 V relative to a standard hydrogen electrode, and a liquid carrier therefor, is utilized to polish a tantalum-containing surface of a substrate, by abrading the surface of the substrate with the composition, preferably with the aid of a polishing pad.
一种适用于钽化学机械抛光(CMP)的组合物由磨料、有机氧化剂和液体载体组成。有机氧化剂具有标准氧化还原电位(E
0
相对于标准氢电极不超过约 0.5 V。氧化形式包括至少一个π-共轭环,其中包括至少一个直接连接到环上的杂原子。杂原子可以是 N、O、S 或它们的组合。在一个方法的实施例中,一种 CMP 组合物包括研磨剂和有机氧化剂,其 E
0
不超过约 0.7 V 的有机氧化剂,以及一种液体载体,通过用该组合物研磨基底的含钽表面,最好是借助抛光垫。